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LONG TERM DEBT - NARRATIVE (Details) - Mortgages
Jun. 28, 2016
USD ($)
Jun. 30, 2018
USD ($)
Debt Instrument [Line Items]    
Mortgage loan, principal amount $ 3,592,000  
Certificate of deposit, amount pledged as collateral   $ 660,000
Fixed monthly principal payment 19,956  
Effective interest rate (as a percent)   5.501%
Debt covenant, minimum liquidity $ 750,000  
Debt service coverage ratio for preceding four quarters for extension of loan 1.0  
London Interbank Offered Rate (LIBOR)    
Debt Instrument [Line Items]    
Basis spread on variable rate (as a percent) 3.50%  
Secured Debt    
Debt Instrument [Line Items]    
Maximum working capital accounts $ 2,000,000